Just wrapped up a trip from Buffalo to Albany and back and noticed the fuel mileage had dropped significantly, so I started checking and discovered that one of my rear brake calipers was dragging and one of my 4x4 hubs was stuck "engaged". Fixed both and the mileage immediately returned to normal.

So it got me wondering, maybe we should make a list of "top things to check" that negatively affect fuel efficiency.

What are your suggestions for the list?

 

Air cleaner
Fuel filter change
Oil change
Time between regens?

 

Yeah I started a thread like this a few months ago cause I found one rear and one front caliper seized closed. My mileage was crap but now I know why. Had to change pad, rotors, and calipers. Mine probably was from sitting a lot because I only drive it usually towing or hauling. Things get stiff when there sitting I guess. Glad u found the problem.

 

Low tires, had a car with a slow leak and always knew when it was getting into the mid to low 20psi's when my mileage would drop by 2-3mpg.

 

Alignment... Poor alignment will create extra drag.

 

1) check the front of the truck, does it have a blue oval that says ford?
2) open the hood, does it say 6.4L anywhere on the motor?
if you said yes to the above then you know why you get crappy mileage.


Just had to say it

 

Id add the follow to above

Fuel quality
Idle time
Driving Consistancy

 

Crawl under the truck, follow the exhaust back from the rear, if you see two large cylindrical apparatus' 12-16" in diameter, you're getting crappy mileage.

 

my cylinder is missing, it must have fell off

 

I think mine was stolen.